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All 78 Plugins Order By

Log Watcher

By Yaroslav Lazor, Kevin Lawver (3934 installs)
Monitors a given log file, reporting the rate of occurrences of a provided term.

Network connections

By Andrew Barringer (2523 installs)
Counts network connections on specific ports you specify. Also summarizes connections by type (udp, tcp, and unix).

URL Monitoring

By Scout, Eric Lindvall (2152 installs)
Monitors the availability of a URL, sending an alert if the URL is not reachable.

Processor statistics (mpstat)

By Yaroslav Lazor (2112 installs)
Reports the following MP statistics : user, nice, sys, iowait, irq, soft, steal, idle, intrps

Simple Process Check

By Scout (1923 installs)
Checks for the presence of one or more processes (based on a list you provide), and raises an alert if some of the processes are not present.


By Eric Lindvall (1892 installs)
Tracks the amount of memory and number of pages being read from and written to the swap space. This information can be more useful than just how much data is in your swap space because it measures churn.

Nginx monitoring

By Luc Castera, Jean-Luc Geering (1468 installs)
Monitors Nginx, reporting the total # of handled requests, the request throughput, and the number of active, reading, writing, and keep-alive connections.

Check NTP Time

By Didip Kerabat, Eric Lindvall (1454 installs)
Checks the clock offset between the local host and a remote NTP server.

EC2 monitor

By Ken Everett (1435 installs)
Reports network latency between servers, virtualization steal %, and EBS performance for EC2 & EBS.

MySQL Query Stats

By Eric Lindvall (1286 installs)
Returns statistics on MySQL connections and select, delete, insert, and update operations.

Disk Inode Usage

By Josh Nichols (1243 installs)
Tracks inode usage (inodes used, capacity used, etc).

Ruby on Rails Monitoring

By Scout (1145 installs)
Monitors a Ruby on Rails application's performance, providing a breakdown of slow requests and a detailed daily performance report. Nothing to install in your Rails app - just provide a full path to the log file.

MongoDB Database Stats

By John Nunemaker, Mike Fiedler (911 installs)
Monitors a specific MongoDB database, reporting metrics on index, storage size, number of objects, etc.

TCP Socket State

By Eric Lindvall (827 installs)
Measures the number of sockets in each socket state. This can be helpful in diagnosing issues with short-lived connections leading to socket starvation and rejected connections.

Redis Monitoring

By Matt Todd, Ches Martin, and Josh Nichols (808 installs)
Monitors a Redis database, reporting commands per-second, connections per-second, Used Memory, and more.

MongoDB Server Status

By John Nunemaker, Mike Fiedler (795 installs)
Reports server status metrics for a MongoDB server (query rate, btree miss ratio, connections, etc).

HAProxy Monitoring

By Scout, Eric Lindvall (782 installs)
Monitors HAProxy, reporting the request rate, error rate, and proxy status for the specified proxy.


By Jason Lee and Eric Lindvall (553 installs)
Tracks Passenger's VM size, process count, private memory usage, the number of application instances currently alive, the number of instances that are currently processing requests, and the number of idle instances.

Puppet Last Run

By Didip Kerabat (551 installs)
Reports the status of the last Puppet run.

Memcached Monitor

By Jesse Newland, Jon Bracy (529 installs)
Provides stats on your memcached instance, including gets/ sets/ hits/ misses/ evictions/ per second, uptime, memory used, KB read per second, KB written per second, and more.

Timestamp Monitor

By Chad Woolley (514 installs)
Checks the timestamp on a given file, generating an alert if the timestamp of the file is older than a given threshold.

Apache Log Analyzer

By Scout (489 installs)
Provides statistics from an Apache access log: request distribution by hour, most popular URIs, traffic sorted by sum, and traffic sorted by mean. Just install this plugin in Scout and provide the full path to the Apache access log file.

Apache Load

By Will Ronco (469 installs)
Monitors Apache traffic, reporting throughput, busy workers, and idle workers.

Simple Port Check

By Scout (457 installs)
Check that a list of provided host:ports accept TCP connections.

MongoDB Replica Set Monitoring

By Kyle Banker and Mark Weiss (422 installs)
Provides overview stats of a MongoDB Replica Set and its individual nodes.

MySQL Replication Monitor

By Mike Mangino, Andre Lewis (388 installs)
Monitors the replication for a master-slave MySQL database setup reporting the number of seconds the slave is behind the master.

MySQL Slow Queries

By Forumwarz (350 installs)
Monitors for slow MySQL queries and generates an alert when the slow query rate increases dramatically.

RabbitMQ Queue Monitoring

By Erik Wickstrom (343 installs)
Monitors a given RabbitMQ Queue

PostgreSQL monitoring

By Robert Coup of Koordinates (231 installs)
Provides a summary of PostgreSQL cluster query activity.

JMX Monitoring

By David Dossot (205 installs)
Reports JMX values. By default, Heap and Non-Heap memory usage metrics are reported. Additional metrics can be specified in the plugin settings.

Monitor /proc/mdstat

By Mark Hasse (204 installs)
Monitors /proc/mdstat for disk failures.

elasticsearch cluster status

By John Wood of Signal (187 installs)
Reports stats on an elasticsearch cluster, including health (green, yellow, red), number of nodes, number of shards, etc.

php-fpm status

By Ankur Bulsara, Chris Cinelli (177 installs)
Reads and parses the php-fpm status page.

elasticsearch index status

By John Wood of Signal (167 installs)
Reports stats on an elasticsearch index, including index size, number of documents, etc. Requires elasticsearch version 0.18.0 or greater.

Resque Monitoring

By Jesse Newland (159 installs)
Monitors Resque, a Redis-backed Ruby library for creating background jobs, placing those jobs on multiple queues, and processing them later.

Delayed Job

By Lukas Rieder, Alexander Lang & Eric Lindvall (154 installs)
Monitors Delayed Job, a Database-backed asynchronous priority queue.

MongoDB Slow Queries

By Jacob Harris (150 installs)
Reports slow queries based on the threshold (100ms or greater) you specify. Provides details on queries that are slow.


By Didip Kerabat (147 installs)
Report the synchronisation state of the NTP daemon running on the server.

Sidekiq Monitor

By Scott Klein (137 installs)
Reports key metrics for Sidekiq, a Ruby message processing library.

Docker Monitoring

By Derek Haynes (135 installs)
Reports key LXC Linux Container metrics.

Varnish Monitoring

By Erik Wickstrom, Joshua Tuberville, and Ali-Akber Saifee (108 installs)
Reports key Varnish metrics.

Sphinx Monitoring

By Sam Sinensky (95 installs)
Monitors Sphinx, an open-source SQL full-text search engine.


By Mike Fiedler (91 installs)
Reports ZooKeeper node stats - including whether the node is a leader or follower, latencies and traffic.

elasticsearch node status

By John Wood of Signal (90 installs)
Reports stats on a node in the elasticsearch cluster, including size of indices, number of docs, memory used, threads used, garbage collection times, etc.

Generic JSON URI

By Kevin Lawver (90 installs)
A versatile plugin to report any data in JSON format to Scout. It can read http://, https://, local files, and more.

RabbitMQ Overall Monitoring

By Erik Wickstrom (85 installs)
Monitors RabbitMQ, an enterprise messaging system based on the emerging AMQP standard.

Nagios Check RAID BETA

By Didip Kerabat (76 installs)
Checks all RAID volumes (hardware and software) that can be identified, reporting if there are any errors.

Kestrel Queue Monitor

By Eric Lindvall (54 installs)
Monitors a specified Kestrel Queue.

SSL Monitor

By Enrico Stahn (53 installs)
Plugin to monitor SSL certificate expiration

Tomcat Monitor BETA

By Ken Everett (40 installs)
Reports request (avg/max) and throughput from the Tomcat log.

Percona Replication Lag BETA

By Patrick O'Brien (37 installs)
Monitor **slave replication lag** via pt-heartbeat, which is provided by the Percona toolkit. Percona's method is considered more reliable than MySQL's internal Seconds_Behind_Master metric.

NFS Monitoring

By Andrew Johnson (28 installs)
Monitors the number of active NFS connections and the state of NFS processes.


By Kevin Lawver (27 installs)
Reports metrics for Beanstalkd, a simple, fast work queue.

uWSGI Monitoring

By Michael Vantellingen (27 installs)
Reports key uWSGI metrics.

Solr Stats BETA

By Michael van Tellingen (25 installs)
Provides performance statistics on the Solr Search Server.

Celery Overall BETA

By Erik Wickstrom (22 installs)
This is a global view of your Celery system. It monitors and reports on how many workers you have running, total task results/state, and task results per minute/second.

CouchDB Overall

By John Wood of Signal (16 installs)
Monitors CouchDB, a document-oriented database that can be queried and indexed in a MapReduce fashion using JavaScript.

MariaDB Galera Cluster Monitor

By Kevin Lawver (16 installs)
Reports key MariaDB Galera Cluster metrics.

Couchbase Stats NEW

By Michael Biven (15 installs)
Reports stats on the couchbase node in the Couchbase cluster.

Celery Tasks BETA

By Erik Wickstrom (13 installs)
Monitors the throughput of your 20 most active Celery tasks.

Java Heap Size BETA

By Ken Everett (13 installs)
Retrieves the Java heap size used out of jmap.

mod_pagespeed BETA

By Josh Nichols (11 installs)
Monitors mod_pagespeed, Google's Apache 2.x module for performing on-the-fly optimization in the Apacheâ„¢ 2 HTTP Server.

Solr Replication BETA

By Michael Grosser (11 installs)
Monitors if Solr servers are replicating properly.

CouchDB Database

By John Wood of Signal (10 installs)
Monitors a specified CouchDB database.

Kestrel Overall Monitor

By Eric Lindvall (9 installs)
Monitors overall Kestrel stats

Ceph Monitoring

By John Axel Eriksson (6 installs)
Monitors Ceph, reporting key metrics.

Amazon SQS Status BETA

By Ankur Bulsara (5 installs)
Returns the size of the specified Amazon SQS queues.

Riak Stats - Core BETA

By Patrick O'Brien (5 installs)
Monitors a Riak database, reporting key metrics.

Riak Stats - FSM BETA

By Patrick O'Brien (5 installs)
Reports Riak Finite State Machine (FSM) time metrics

Maatkit mk-heartbeat Monitor BETA

By Matt Griffith (4 installs)
Monitors mk-heartbeat.log for replication delay. mk-heartbeat.log is generated by the Maatkit 3rd-party utility.


By Clint Nelissen (4 installs)
Reports key FreeRADIUS stats

Mongrel Cluster Monitor

By Highgroove Studios (2 installs)
Uses mongrel_rails cluster::status to determine if any mongrels in your cluster have gone down. Sends alerts and attempts to restart when mongrels go down.

Starling Monitor

By Mike Mangino (1 install)
Monitors the number of items in a starling queue, generating an alert if the maximum queue depth is exceeded for a given queue.

Opsource Cloud Files BETA

By Evan Smith (1 install)
Monitors an Opsource Cloud Files account, reporting bandwidth and storage metrics.

Celery Task Details BETA

By Erik Wickstrom (1 install)
Monitors detailed stats on specific Celery task types (results/states, average runtime, etc).

Gearman Overview NEW

By Michael Mattax (1 install)
An overview of Gearman status.

Tungsten Monitoring BETA

By Ben Somers / (0 installs)
Monitors Tungsten status, replication roles, datasources, and latencies.

Gearman Task NEW

By Michael Mattax (0 installs)
The status of a specific Gearman task

Latest Help Entries

  • Delayed Job
    Plugin would not compile - uninitialized constant ActiveSupport::Dependencies::Mutex
    Jun 19
  • Passenger
    Error: sudo: sorry, you must have a tty to run sudo
    Nov 07
  • Passenger
    Error: [sudo] password for username OR sudo: no tty present and no askpass program specified
    Nov 07
  • EC2 monitor
    No metrics reported
    Oct 12
  • Server Load
    Why is the load displayed in Scout lower than the top/uptime output?
    Sep 30
  • Device Input/Output (iostat)
    Using with Logical Volume Mounts (LVM)
    Aug 23
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